Precision spectroscopy of cold strontium atoms, towards optical atomic clock

2012 ◽  
Vol 60 (4) ◽  
pp. 707-710 ◽  
Author(s):  
M. Bober ◽  
J. Zachorowski ◽  
W. Gawlik ◽  
P. Morzyński ◽  
M. Zawada ◽  
...  
Keyword(s):  
Narrow Band ◽  
Frequency Comb ◽  
Optical Transition ◽  
Optical Cavity ◽  
National Laboratory ◽  
Atomic Clock ◽  
Optical Traps ◽  
Precision Spectroscopy ◽  
Absolute Frequency ◽  
Narrow Band Laser

Abstract This report concerns the experiment of precision spectroscopy of cold strontium atoms in the Polish National Laboratory of Atomic, Molecular and Optical Physics in Toruń. The system is composed of a Zeeman slower and magneto-optical traps (at 461 nm and 689 nm), a frequency comb, and a narrow-band laser locked to an ultra-stable optical cavity. All parts of the experiment are prepared and the first measurements of the absolute frequency of the 1S0-3P1, 689 nm optical transition in 88Sr atoms are performed.

Absolute frequency comb comparisons and the measurement of optical atomic clock transitions

2018 ◽  
Author(s):  
Holly Leopardi ◽  
Josue Davila-Rodriguez ◽  
Jeff Sherman ◽  
Franklyn Quinlan ◽  
Scott Diddams ◽  
...  
Keyword(s):  
Frequency Comb ◽  
Atomic Clock ◽  
Absolute Frequency

Modulation transfer function testing of FPA using narrow-band laser speckle

2000 ◽  
Author(s):  
Qing Hua ◽  
Wenlong Zheng ◽  
Yuguang Li ◽  
Yinzhong Liang ◽  
Ping'an He ◽  
...  
Keyword(s):  
Transfer Function ◽  
Modulation Transfer Function ◽  
Narrow Band ◽  
Laser Speckle ◽  
Modulation Transfer ◽  
Function Testing ◽  
Narrow Band Laser

Frequency combs and precision spectroscopy of atomic hydrogen

2019 ◽  
pp. 142-215
Author(s):  
Thomas Udem
Keyword(s):  
High Resolution ◽  
Visible Light ◽  
Laser Spectroscopy ◽  
Quantum Electrodynamics ◽  
Atomic Hydrogen ◽  
Frequency Comb ◽  
Atomic Clock ◽  
Laser Frequency ◽  
High Resolution Spectroscopy ◽  
Frequency Combs

A laser frequency comb allows the phase coherent conversion of the very rapid oscillations of visible light of some 100s of THz down to frequencies that can be handled with conventional electronics. This capability has enabled the most precise laser spectroscopy experiments yet, which have allowed the testing of quantum electrodynamics, to determine fundamental constants and to construct an optical atomic clock. The chapter reviews the development of the frequency comb, derives its properties, and discusses its application for high resolution spectroscopy of atomic hydrogen.

scholarly journals Frequency-comb-assisted broadband precision spectroscopy with cascaded diode lasers

2016 ◽  
Vol 41 (13) ◽  
pp. 3134 ◽  
Author(s):  
Junqiu Liu ◽  
Victor Brasch ◽  
Martin H. P. Pfeiffer ◽  
Arne Kordts ◽  
Ayman N. Kamel ◽  
...  
Keyword(s):  
Frequency Comb ◽  
Diode Lasers ◽  
Precision Spectroscopy

scholarly journals Superradiance on the millihertz linewidth strontium clock transition

2016 ◽  
Vol 2 (10) ◽  
pp. e1601231 ◽  
Author(s):  
Matthew A. Norcia ◽  
Matthew N. Winchester ◽  
Julia R. K. Cline ◽  
James K. Thompson
Keyword(s):  
Cavity Mode ◽  
Optical Cavity ◽  
Atomic Clock ◽  
Laser Frequency ◽  
Gain Medium ◽  
Optical Clock ◽  
Frequency Noise ◽  
Clock Transition ◽  
Reference Cavity ◽  
High Finesse

Laser frequency noise contributes a significant limitation to today’s best atomic clocks. A proposed solution to this problem is to create a superradiant laser using an optical clock transition as its gain medium. This laser would act as an active atomic clock and would be highly immune to the fluctuations in reference cavity length that limit today’s best lasers. We demonstrate and characterize superradiant emission from the millihertz linewidth clock transition in an ensemble of laser-cooled 87Sr atoms trapped within a high-finesse optical cavity. We measure a collective enhancement of the emission rate into the cavity mode by a factor of more than 10,000 compared to independently radiating atoms. We also demonstrate a method for seeding superradiant emission and observe interference between two independent transitions lasing simultaneously. We use this interference to characterize the relative spectral properties of the two lasing subensembles.

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